Hardware Description and Reference for Avaya ... - Avaya Support

Circuit packs, channel service units, and power supplies
EPNs that are within 22 miles (35.4 kilometers) of the PPN can be coupled using single-mode
fiber-optic cable. You must use a DS1 converter complex to connect an EPN when the distance
between the PPN and the EPN exceeds a certain distance or private right-of-way is unavailable.
The maximum distances are 5 miles (8 kilometers) for multimode cable, or 22 miles (35.4 km)
for single-mode cable. One DS1 circuit pack is placed on each end of the DS1 converter
complex.
The TN1654 DS1 converter requires a set of Y-cables to connect to a TN570B Expansion
Interface circuit pack.
TN2138 central office trunk (8 ports)
Note:
Note: This circuit pack is no longer sold.
The TN2138 central office (CO) trunk circuit pack provides eight analog loop start CO trunk
ports for Italy. Each port has a tip and ring signal lead. The TN2138 has 50-Hz, 12-kHz, and
16-kHz periodic pulse metering (PPM).
TN2139 direct inward dialing trunk(8 ports)
Note:
Note: This circuit pack is no longer sold.
The TN2139 direct inward dialing trunk for Italy provides eight analog direct inward dialing (DID)
trunk ports for analog DID signaling. Each of the eight ports has a tip and ring signal lead.
TN2140B tie trunk (4-wire, 4 ports)
The TN2140B tie trunk is used in Hungary and Italy. The TN2140B provides four ports for 4-wire
E&M lead signaling tie trunks. The TN2140 provides continuous E&M signaling and
discontinuous E&M signaling. The TN2140 also provides administrable A- and µ-Law
companding and standard Type 1 and Type 5 signaling. The TN2140B is required for Hungary.
246 Hardware Description and Reference for Avaya Communication Manager